Question about Toshiba 51H84 51" Rear Projection HDTV-Ready Television

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Toshiba TN55X81 One of my circuit boards is cracked, I need a new or functioning used one. does anyone know where I can get used parts for my TV?

Posted by Dennis Devens on

  • 4 more comments 
  • Dennis Devens Jul 24, 2007

    The TV model number is TN55X81

  • Dennis Devens Jul 25, 2007

    The model is TN55X81... thanks.

  • Dennis Devens Nov 06, 2007

    Would the power board be interchangeable with that of a
    TP55F80 Toshiba?

  • Glocknor Dec 23, 2007

    I also have a Toshiba TN55X81 with what I thinks is a convergence problem. I get some double imaging in a semi-circle confirguration at the bottom of the screen. I would be willing to try replacing the board myself if someone could give me an idea which board my problem most likely originates from. The TV is only 6 years old and has been great up until this issue. I've seen some of the repair quotes for a housecall and I'm seeing $ 500-$600 estimates - not sure if it would be worth that kind of investment - please advise.

  • Monkey39 Dec 24, 2007

    My TN55X81 suddenly is out of convergence easily 2"

  • auggiepr Jul 11, 2008

    red and blue colors are not aligning



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What's the model number, the TN55X81, or the 51H84?

Posted on Jul 24, 2007

  • Anonymous Jul 25, 2007

    Whay board is bad? PTS electronics have a lot of boards available for this set. Call 10800-844-7871 and ask them about the board you need, Here is a list of boards available for your set from PTS.

    Digital Convergence Board TN55X81 23783434 AVA

    CRT Drive Blue TN55X81 23783427 SNA

    CRT Drive Green TN55X81 23783426 SNA

    Power Supply TN55X81 23783608 AVA

    Convergence Out TN55X81 23783607 AVA

    Maicon TN55X81 23783629 AVA

    Signal Board TN55X81 23783605 AVA

    Digital Convergence Board TN55X81 23783609 AVA

    Maicon TN55X81 23783629 AVA

    Digital Convergence TN55X81 23783609 AVA

    Power Supply TN55X81 23783608 AVA

    Convergence Out TN55X81 23783607 AVA

    Signal Board TN55X81 23783605 AVA

    Digital Convergence TN55X81 23783434 AVA

    CRT Drive B TN55X81 23783427 SNA
    CRT Drive G TN55X81 23783426 SNA
    Deflection Board TN55X81 23783420 AVA

  • Anonymous Nov 06, 2007

    I am really not sure. Maybe call up ptscorp and ask them of the compadability.



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1 Answer

I have a TN55x81. the picture will just stop working (goes black). I will shut it off for about 5 minutes and then it will work fine. Some times for 2-3 days and other times just 10-15 minutes. Any ideas??

Intermittent problems on this type of TV are often because of cracked solder joints on the circuit board. They can be hard to see. When the TV gets warm, parts on the board expand and move by tiny amounts, sometimes with the right amount of expansion or vibration from the speakers, the broken solder joint looses connection and the unit shuts down. When things cool-off, the contact can be made again all by itself and everything fine until it happens again. Given the random nature of your problem, this is a suspected problem. Often it is the solder around the lead of a large component which is mounted to a heatsink.

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The video on ours keeps distorting by 'crunching in' from the sides randomly. Any thoughts??

Ur tv have a problem call convergence,it dead.The convergence board require 2 STK convergence ICS and some or all it resistors to be replaced to solved convergence problems.U know how to do soldering?Have soldering iron,tools and solders?Tries Websites like, to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

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My toshiba tn55x81 is getting lines in the screen. nothing major but the main problem is that it is losing its color focus after about 5 minutes of being on. i did adjust the color convergence and it did...

the prism is off balance or some bulb burning out, and you might need to replace parts. this would require a tv repairman, it is not an easy thing to do, looking at 200 to 400 repair.

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1 Answer

Toshiba TN55X Convergence problem.

You brought up an issue that we hadn't considered. Shortly after hooking up our TV to the receiver with a composite video, our convergence which wacko. My hubby replaced the 2 ICs, but now our power button just flashes red, with no picture. Not sure if new ICs are faulty or if it's another issue. He will replace old ICs to see if problem still exists with turning on the tube. And he'll try disconnecting the video signal to see if problem exists.

Ouch.. may have to consider another tv thanks to new technology ??????

Good luck solving your problem.

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1 Answer

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You can do this with the built-in user tool, but there's also a far more powerful set of options in the service mode. To save you the trouble (I advise doing a LOT of reading before attempting any of this) here's a solid set of various tutorials based on what form of "separation" you have occurring:

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I hope this info is useful!

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